Neonatal hematemesis and melena d/t swallowed matern blood

This code signifies the presence of blood in a newborn's vomit (hematemesis) or stool (melena) that originates from maternal blood ingested during birth or breastfeeding. It indicates that the infant's gastrointestinal bleeding is not intrinsic but rather due to swallowed maternal blood.

Apply this code when a neonate presents with hematemesis or melena, and diagnostic workup confirms the presence of maternal hemoglobin (e.g., Apt test positive for maternal blood). This typically occurs in the first few days of life and is supported by documentation ruling out other causes of neonatal GI bleeding.

• Ensure documentation explicitly states "swallowed maternal blood" as the cause of the hematemesis/melena.
• Do not use this code if the bleeding is determined to be from an intrinsic neonatal source (e.g., necrotizing enterocolitis, vitamin K deficiency).
• Consider sequencing this code as a secondary diagnosis if a more specific underlying condition (e.g., difficult labor leading to excessive maternal bleeding) is also documented and treated.